HST Keyword Dictionary

Space Telescope Science Institute

3700 San Martin Drive

Baltimore, MD 21212

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Keyword Definitions for the

dated 15-APR-94

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Y1STCHNL
first channel to be processed 
Datatype: INTEGER*4           
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YAPERPO1
same as first YAPERHOE|LOE 
Datatype: INTEGER*4           
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YAQMD
acquisition mode 
Datatype: INTEGER*4           
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YDATALIM
high byte of acquisition limit 
Datatype: INTEGER*4           
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YDEAD
accum close time 
Datatype: INTEGER*4           
Units:
The accumulator "close time" (interval during which the accumulator counting is disabled) is specified in units of 7.8125 microsecs. (norton.35)

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YFFCPWR
flat field cal lamp power 
Datatype: INTEGER*4           
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YFGWAPO1
same as first YFGWAPOS 
Datatype: INTEGER*4           
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YINTEG
number of integrations/X-step 
Datatype: INTEGER*4           
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The number of integrations controls the number of open/close time pairs of FOS Analog Signal Processor samples of the output from the rate limiter that are done with no changes in magnetic deflection. (norton.34)

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YLINSFRM
lines per frame 
Datatype: INTEGER*4           
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YLIVE
accum open time 
Datatype: INTEGER*4           
Units:
The accumulator "open time" (interval during which the accumulator counting is enabled) is specified in units of 7.8125 microsecs. (norton.34)

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YMCLEARS
memory clears/data acquisition 
Datatype: INTEGER*4           
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YMSLICES
number of memory slices 
Datatype: INTEGER*4           
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YNOISELM
burst noise rejection limit 
Datatype: INTEGER*4           
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YNUMCHNL
number of channels to be processed 
Datatype: INTEGER*4           
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YOVRSCAN
X-deflection overscan 
Datatype: INTEGER*4           
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YPLRZPO1
same as first YPLZRHOE|LOE 
Datatype: INTEGER*4           
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YPTRNS
patterns per readout 
Datatype: INTEGER*4           
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YRANGE
Y range 
Datatype: INTEGER*4           
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YREADCYC
readouts/memory clear 
Datatype: INTEGER*4           
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YWRDSLIN
words per line 
Datatype: INTEGER*4           
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YXBASE
X-deflection base 
Datatype: INTEGER*4           
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YXPITCH
X-deflection pitch between diode 
Datatype: INTEGER*4           
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YXSTEPS
X-deflection sub-steps 
Datatype: INTEGER*4           
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YYBASE
Y-deflection base 
Datatype: INTEGER*4           
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YYINDFHY
do deflection hyst. at begin. of data acqn. 
Datatype: INTEGER*4           
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YYPATH
path identification 
Datatype: INTEGER*4           
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YYPITCH
Y-deflection pitch 
Datatype: INTEGER*4           
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YYSTEPS
Y-deflection sub-steps 
Datatype: INTEGER*4           
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HST Keyword Dictionary: 15-APR-94: (rose@stsci.edu)